Electric rivet heater



A ia] 1 1924. 1,488,681

W. S. JOHNSON ET AL ELECTRIC RIVET HEATER Filed Feb. 17 19 21 Patented Apr. 1, 1924.

UNITED STATES PATENT OFFICE.

WILLIAI 'S. JOHNSON AND JOHN W. SHEFFER, OF BERWICK, PENNSYLVANIA, AS-

SIGNORS TO AMERICAN CABAND FOUNDRY COMPANY, OF ST. LOUIS, MISSOURI, A

CORPORATION OF NEW JERSEY.

ELECTRIC RIVET HEATER.

Application filed February 17, 1921.

To all whom it may concern:

Be it known that VILLIAM S. JOHNSON and JOHN W. Snnrrnn, residing at Ber-wick, in the county of Columbia and State of Pennsylvania, and being citizens of the United States, have invented certain new and useful Improvements in Electric Rivet Heaters, of which the following is a full, clear, and exact description, such as will enable others skilled in the art to which it appertains to make and use the same, ref erence being had to the accompanyin drawings, which illustrate the preferred ?01'II1 of the invention, though it is to be: understood that the invention is not limited to. the exact.

details of construction shown and described, as it is obvious that various modifications thereof within the scope of the claims will occur to persons skilled in the art.

In said drawings:

Figure 1 is a view in front elevation of a portion of an electric rivet heater showing our improvement applied thereto;

Figure 2 is a front elevation on a larger scale of our improved means for adjusting the position of one of the electrodes of the secondary coil of an electric rivet heater;

Figure 3 is a side elevation of the parts shown in Fig. 2 with the locking cam shown 7 in full lines in position to hold the adjusting means locked in engaging position and in dotted lines in position to release the adjusting means; Figure 4 is a device; and

F i re 5 is a view similar to -F ig. 3 showing t e cam in positionto release the adjusting means and the adjusting means disengaged from the supporting means.

It is an object of our invention to provide an electric rivet heater in which the gap between the electrodes of the secondary coil may be adjusted so that rivets of difl'erent lengths may be accommodated and it is also an object of our-invention to provide a simple and efiicient mechanism that may be quickly operated to effect the desired adjustments of. the electrodes.

plan View of our improved 1 In the drawings, 1 designates the primary coils, 2 the secondary coils and 3 the separators between the coils. and secondary coils 1 and 2 and the separators 3 are mounted upon the upper portion of the rectangular laminated core 4 confined Both the primary Serial No. 445,688.

between the pairs of members 6 and 7 that are pressed against the core by the bolts 8, one of the bolts 8 securing the members 6 to the members 7. The members 7 are, in turn, secured to and carried by a suitable sup porting frame (not shown).

} Secured to the membersfi by the bolts 8 and extending over the coils 1 and 2 is the U-shaped supporting member 9 consisting of an angle bar having, as shown in Figs. 3 and 5, one of its flanges, in the portion of the bar that overlies the coils, lying in a horizontal plane with its outer edge over the electrodes of the secondary coils. To the upper electrode 10 a U-shaped clip 11 is secured by bolts 12. In openings in the le s of the clip 11 is mounted a bolt 13 held therein by the nuts 14, the bolt 13 serving to pivotally connect the adjustment member 15 to the clip 11 and electrode 10. The adjustment member 15 comprises the projecting sides 16 joined for the greater part of their length by the back portion 17 integral therewith. The sides 16 are provided with openings that receive the bolt 13, openings that receive a bolt 18 that carries a handle 19 and a plurality of parallel slots 20 designed to receive the horizontal flange 21 of the supporting member 9.

Secured in openings in the vertical flange 22 of the supporting member 9 are bolts 23 having, at one end, reduced screw threaded portions that enter the openings in the flange 22,the shoulder formed on the bolt engaging the flange 22 on one side and the nuts 24 on the bolt 23 engaging the flange 22 on the other side. Theother ends of the bolts 23 are provided with eyes 25 in which is mounted the cam shaft 26 having the cam 27 provided with an operating handle 28,

' the cam 27 being adapted, in one position,

adjustment member 15 permitting the member 15 to be disengaged from the flange 21 of the member 9 so that thefiange'21 may be engaged 'in another slot 20 in the sides 16 of the adjustment member 15 and the gap between the electrodes 10 and 29 of the secondary coil 2 thereby varied so that rivets of different lengths may be accommodated.

The lower electrode 29 of the secondary coil 2 is operated by a rod 30 pivotally connected at one end to the electrode 29 and to an operating lever (not shown) at the other end.

IVhat we claim is:

1. In an electric rivet heater, a secondary coil having an electrode, means for adjusting the position of said electrode and means for locking said adjusting means.

2. In an electric rivet heater. a secondary coil having an electrode. a support for said electrode, adjusting means for said elect-rode connecting said electrode and said support and means for locking said adjusting means.

3. In an electric rivet heater, a secondary coil having an electrode, a support for said elect-rode, adjusting means connected to said electrode and engaging said support and means for holding said adjusting means in engagement with said support.

4. In an electric rivet heater, a secondary coil having an electrode, a support for said electrode, adjusting means connecting said support and said electrode and means carried by said support for securing said adjusting means to said support.

5. In an electric rivet heater, a secondary coil having an electrode, a support for said electrode, adjusting means pivot-ally connected to said electrode and ngaging said support and means carried by said support for holding said adjusting means in engagement with said support.

6. In an electric rivet heater, a secondary coil having an electrode, a support for said electrode, slotted arms connecting said electrode and said support and means holding said arms in engagement with said support.

7. In an electric rivet heater, a secondary coil having an electrode, a support for said electrode and slotted arms connecting said electrode and said support.

8; In an electric rivet heater, a secondary coil having an electrode, an angle. bar support for said electrode and slotted arms connected to said electrode and adapted to engage on a flange of said support.

S). In an electric rivet heater, a secondary coil having an electrode, a support for said electrode, adjusting means connecting said electrode and said support and a cam adapted to force said adjusting means into engagement with said support.

10. In an electric rivet heater, a secondary coil having an electrode, a support for said electrode, slotted arms engaging said electrode and said support and a. cam adapted to hold said arms in engagement with said support.

11. In an electric rivet heater, a secondary coil having an electrode, an angle bar support for said electrode, slotted arms connected to said electrode and adapted to engage a flange of said support and a cam carried by said support and adapted to hold said arms in engagement with said flange.

12. In an electric rivet heater, a secondary coil having aplurality of movable electrtx'les, means to adjust the normal opening between said electrodes and means to retain said adjusting means in position.

13. In an electric rivet heater, a secondary coil having a plurality of movable electrodes and means adapted to give a step by step adjustment of the normal opening between said electrodes.

14. In an electric rivet heater, a secondary coil having a plurality of movable electrodes, means adapted to provide a step by step adjustment for one of said electrodes and operating mechanism for the other of said electrodes.

1.5. In an electric rivet heater, a secondary coil having a plurality of spaced electrodes, operating means adapted to vary the opening between said electrodes and step by step adjusting means adapted to vary the opening between said electrodes independently of said operating means.

16. In an electric rivet heater, a secondary coil having a plurality of spaced electrodes, operating means adapted to vary the opening between said electrodes, adjusting means adapted to vary the opening between said electrodes independently of said operating means and locking means for said adjusting means.

17. In an elect-ric rivet heater, a secondary coil having a plurality of spaced electrodes, operating means adapted to vary the opening between said electrodes. support-ing means for one of said electrodes adapted to provide a step by step adjustment ofthe opening between said electrodes independently of said operating means and locking means adapted to hold said supporting means in adjusted position.

In witness whereof we have hereunto set out hands in the presence of two witnesses.

WILLIAM S. JOHNSON, JOHN IV. SHEFFER. Witnesses:

H. F. TBAUGH, Faun A. HOFFMAN. 

